At the start, enter a valid currency in ISO 4217 format as seen here: https://en.wikipedia.org/wiki/ISO_4217#Active_codes_(list_one) After that, press the up and down arrow keys to go in and go out respectively. Press p to toggle the prices list.
Once upon a time in an NES (New English School, Kuwait) classroom between November and a winter holiday in the lesson "Projects" which non-Islamic people do sometimes when there's Islamic going on simultaneously, all of the people in my "Projects" class including me were tasked to make a restaurant. I then thought a little bit and came up with the question, "What if the menu rotated monthly?" For all I knew, nobody had done it before, so that's how this project started. I ended up answering this question with 1 and a half months of work, 18 sprites and an answer to this question. The answer was "It would be surprising". That's just my opinion however. Jump into this project and decide the answer for yourself!